Outcrop of the Rolesville Granite. Yes, named for where you live. Those spheroidally-weathered boulders are typical - and a beautiful backdrop for your nice bike. Check your house for radon, and happy riding.
You called it. We bought the house in 99 and during the inspection process the Radon was just over the legal limit. We have an extraction system that has lowered the number well below the requirement. Also, there are many "rocks" around where I live but not of this size normally.
Be safe all, Frank.
